Patents by Inventor Ingolf Mielke
Ingolf Mielke has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Apparatus and process for the production of vinyl chloride by thermal cracking of 1,2-dichloroethane
Patent number: 7767869Abstract: The invention relates to a process for the production of vinyl chloride by thermal cracking, in which the energy balance, the operating time of the cracking furnace and/or the yield of the reaction are distinctly enhanced in comparison with the prior art. A pressure of from 1.4 to 2.5 MPa is established in the cracking coil at a temperature of from 450 to 550° C. and, for pre-heating the EDC (=1,2-dichloroethane) introduced, inter alia the waste heat of the gas stream leaving the top of the quench column is utilized.Type: GrantFiled: March 17, 2004Date of Patent: August 3, 2010Assignee: Vinnolit Technologie GmbH & Co. KGInventors: Peter Kammerhofer, Ingolf Mielke, Peter Schwarzmaier -
Patent number: 7718138Abstract: The present invention relates to a device and a process for introducing gas into a fluidised bed reactor having at least one gas inlet pipe (2, 3) located underneath and/or above the fluidised bed for introducing gas into the fluidised bed, characterized in that the gas inlet pipe (2, 3) has gas-swirling means upstream of and/or at its mouth.Type: GrantFiled: May 26, 2003Date of Patent: May 18, 2010Assignee: Vinnolit Technologie GmbH & Co. KGInventors: Klaus Krejci, Peter Kammerhofer, Ingolf Mielke, Uwe Wäterling
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Method for producing unsaturated halogenic hydrocarbons and device suitable for use with said method
Patent number: 7309471Abstract: An apparatus for producing ethylenically unsaturated aliphatic halogenic hydrocarbons by thermal cleavage of saturated aliphatic halogenic carbons using an apparatus that introduces an educt gas stream into a reactor which includes at least one supply conduit which opens into the reactor, the supply conduit feeds a heated gas formed from cleavage promotors and radicals produced by a nonthermal plasma device which permits an increased in the yield of the cleavage reaction.Type: GrantFiled: April 30, 2003Date of Patent: December 18, 2007Assignee: Uhde GmbHInventors: Michael Benje, Horst Ertl, Ingolf Mielke, Thomas Wild, Peter Kammerhofer, Peter Schwarzmaier -
Apparatus and process for the production of vinyl chloride by thermal cracking of 1,2-dichloroethane
Publication number: 20060199983Abstract: The invention relates to a process for the production of vinyl chloride by thermal cracking, in which the energy balance, the operating time of the cracking furnace and/or the yield of the reaction are distinctly enhanced in comparison with the prior art. A pressure of from 1.4 to 2.5 MPa is established in the cracking coil at a temperature of from 450 to 550° C. and, for pre-heating the EDC (=1,2-dichloroethane) introduced, inter alia the waste heat of the gas stream leaving the top of the quench column is utilized.Type: ApplicationFiled: March 17, 2004Publication date: September 7, 2006Applicant: VINNOLIT GMBH & CO. KGInventors: Peter Kammerhofer, Ingolf Mielke, Peter Schwarzmaier -
Patent number: 7009084Abstract: The invention relates to a method for producing high purity 1,2-dichloroethane using a liquid reaction medium that is circulated and that is essentially composed of 1,2-dichloroethane and a catalyst. At least ethylene and chlorine are added to the reaction medium and a mainly chlorine-containing gas flow is dissolved in a part of the reaction medium which is essentially devoid of dissolved ethylene. The gaseous components not dissolved in this solution are removed from the solution by means of a gas-separation device and the solution from which the undissolved gas components were removed is contacted with ethylene which is present in dissolved form.Type: GrantFiled: February 1, 2003Date of Patent: March 7, 2006Assignees: Uhde GmbH, Vinnolit Technologie GmbH & Co. KGInventors: Michael Benje, Dieter Jaculi, Ingolf Mielke, Peter Schwarzmaier, Klaus Krejci, Joachim Schubert, Horst Ertl
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Publication number: 20050250967Abstract: The present invention relates to a device and a process for introducing gas into a fluidised bed reactor having at least one gas inlet pipe (2, 3) located underneath and/or above the fluidised bed for introducing gas into the fluidised bed, characterised in that the gas inlet pipe (2, 3) has gas-swirling means upstream of and/or at its mouth.Type: ApplicationFiled: March 26, 2003Publication date: November 10, 2005Inventors: Klaus Krejci, Peter Kammerhofer, Ingolf Mielke, Uwe Waterling
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Publication number: 20050177011Abstract: The invention relates to a method for producing high purity 1,2-dichloroethane using a liquid reaction medium that is circulated and that is essentially composed of 1,2-dichloroethane and a catalyst. At least ethylene and chlorine are added to the reaction medium and a mainly chlorine-containing gas flow is dissolved in a part of the reaction medium which is essentially devoid of dissolved ethylene. The gaseous components not dissolved in this solution are removed from the solution by means of a gas-separation device and the solution from which the undissolved gas components were removed is contacted with ethylene which is present in dissolved form.Type: ApplicationFiled: February 1, 2003Publication date: August 11, 2005Inventors: Michael Benje, Dieter Jaculi, Ingolf Mielke, Peter Schwarzmaier, Klaus Krejci, Joachim Shubert, Horst Ertl
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Method for producing unsaturated halogenic hydrocarbons and device suitable for use with said method
Publication number: 20050124835Abstract: The invention relates to a method for producing ethylenically unsaturated aliphatic halogenic hydrocarbons by the thermal cleavage of saturated aliphatic halogenic hydrocarbons. According to said method, an educt gas stream is introduced into a reactor, which comprises at least one supply conduit that opens into said reactor. The supply conduit feeds a heated gas formed from cleavage promoters and radicals into the reactor. The method permits an increase in the yield of the cleavage reaction.Type: ApplicationFiled: April 30, 2003Publication date: June 9, 2005Inventors: Michael Benje, Horst Ertl, Ingolf Mielke, Thomas Wild, Peter Kammerhofer, Peter Schwarzmaier -
Publication number: 20040073073Abstract: A process and an apparatus are described for the preparation of 1,2-dichloroethane by reacting ethene with hydrogen chloride and an oxygen-containing gas in an oxychlorination reactor by means of a fluidised bed with formation of a reaction gas, wherein the reactor gas is filtered outside the oxychlorination reactor by means of at least one filter candle.Type: ApplicationFiled: November 21, 2003Publication date: April 15, 2004Inventors: Peter Kammerhofer, Ingolf Mielke, Horst Ertl, Guenter Staib
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Publication number: 20030176748Abstract: A process is described for the preparation of 1,2-dichloroethane by reacting ethene with hydrogen chloride and an oxygen-containing gas in an oxychlorination reactor with formation of a reaction gas, wherein the reaction gas is, after filtration, condensed without prior quenching.Type: ApplicationFiled: February 14, 2003Publication date: September 18, 2003Inventors: Peter Kammerhofer, Ingolf Mielke, Horst Ertl, Dieter Jaculi, Manfred Stoeger
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Patent number: 6417414Abstract: The present invention is directed to a process for preparing 1,2-dichloroethane by reacting ethene with hydrogen chloride and oxygen over a copper-containing fluidized-bed catalyst. The discharge of the catalyst from the reactor per se is avoided if the catalyst is virtually completely retained in the upper part of the reactor by means of superfine filtration.Type: GrantFiled: July 31, 2000Date of Patent: July 9, 2002Assignee: Vinnolit Monomer GmbH & Co. KGInventors: Horst Ertl, Peter Schwarzmaier, Ingolf Mielke, Peter Kammerhofer
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Patent number: 6235953Abstract: The preparation of 1,2-dichloroethane (EDC) is carried out by feeding ethylene and chlorine into circulating EDC (direct chlorination) such that the reaction mixture boils and the heat of the reaction is led away from the gas space.Type: GrantFiled: August 23, 1999Date of Patent: May 22, 2001Assignee: Vinnolit Monomer GmbH & Co. KGInventors: Peter Schwarzmaier, Ingolf Mielke
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Patent number: 6204419Abstract: Process and apparatus for preparing 1,2-Dichloroethane by direct chlorination If in the reaction of ethylene with chlorine to form 1,2-dichloroethane (EDC) the catalyst components sodium chloride and iron(III) chloride are used in a molar ratio of below 0.5, then the EDC is obtained in sufficiently high purity to allow direct conversion to vinyl chloride. With maintenance of the stated molar ratio the reaction can be carried out very advantageously in terms of equipment and energy consumption, for example by vaporizing some of the EDC in an expansion vessel.Type: GrantFiled: June 7, 1995Date of Patent: March 20, 2001Assignee: Vinnolit Technologie GmbH & Co. KGInventors: Jürgen Eichler, Reinhard Krumböck, Wenzel Kühn, Peter Schwarzmaier, Thomas Wild, Rudolf Spielmannleitner, Manfred Stöger, Ingolf Mielke
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Patent number: 5545780Abstract: The conversion rate in the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane is determined by measuring the absorption of high-energy radiation, the pressure and the temperature of the gases issuing from the cracking furnace.Type: GrantFiled: February 8, 1995Date of Patent: August 13, 1996Assignee: Hoechst AktiengesellschaftInventors: Peter Schwarzmaier, Peter Hackl, Manfred Stoger, Ingolf Mielke
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Patent number: 5507920Abstract: In the preparation of vinyl chloride by thermal cracking of 1,2-dichloroethane, three distillation stages are used to distill off first hydrogen chloride, then vinyl chloride and finally entrained hydrogen chloride with vinyl chloride. If, in the last stage, entrained water is not drawn off via the bottom, it is recirculated with the top product to the first stage and causes corrosion. Removal of the water at the top of the third distillation stage, advantageously by drying, prevents the corrosion.Type: GrantFiled: December 7, 1994Date of Patent: April 16, 1996Assignee: Hoechst AktiengesellschaftInventors: Peter Schwarzmaier, Peter Kammerhofer, Manfred Stoger, Helmut Kalliwoda, Ingolf Mielke
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Patent number: 5334783Abstract: A process for the preparation of hexafluoropropene by thermal cleavage of chlorotetrafluoroethane and/or chlorohexafluoropropane or a mixture of chlorotetrafluoroethane and perfluorocyclobutane at 600.degree. to 1,000.degree. C. and under a pressure of 1 to 1,000 kPa is described. The thermal cleavage is carried out in the presence of at least 0.05 mole of tetrafluoroethylene per mole of chlorotetrafluoroethane and/or chlorohexafluoropropane or mixture of chlorotetrafluoroethane and perfluorocyclobutane employed. By means of this process hexafluoropropene is obtained for a small extra expenditure on apparatus at a good selectivity and in an improved space-time yield.Type: GrantFiled: September 22, 1992Date of Patent: August 2, 1994Assignee: Hoechst AktiengesellschaftInventors: Reinhold Freudenreich, Ingolf Mielke, Karl Rettenbeck, Thomas Schottle
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Patent number: 5210345Abstract: An addition of benzotrichloride produces a significantly higher yield of vinyl chloride in the thermal cleavage of 1,2-dichloroethane.Type: GrantFiled: October 9, 1992Date of Patent: May 11, 1993Assignee: Hoechst AktiengesellschaftInventor: Ingolf Mielke
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Patent number: 5068471Abstract: A process for continuous telomerization is described, in which at least one telogenic compound and at least one taxogenic compound are reacted at from 40.degree. to 150.degree. C. under a pressure of from 0.1 to 3 MPa in the presence of at least one catalyst in an elongate cylindrical reaction space. After it has left the reaction space, the reaction mixture is separated, for example by distillation, the desired higher-molecular telomers are discharged as the bottom product, and the undesired low-molecular telomerization products are stripped off over the top, condensed and recycled into the process in a first circulation. In a second circulation, a part of the reaction mixture is taken off towards the end of the reaction space and reintroduced into the initial part of the reaction space. This allows an improved space-time yield and a better selection of defined product cuts.Type: GrantFiled: December 19, 1990Date of Patent: November 26, 1991Assignee: Hoechst AktiengesellschaftInventors: Norbert Paul, Rudolf Huber, Ingolf Mielke
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Patent number: 4143224Abstract: Process for the manufacture of vinyl chloride polymers containing at least 50% by weight of polymerized vinyl chloride by polymerizing the monomer(s) in aqueous phase at 10 to 90.degree. C. in the presence of an oil-soluble catalyst and 0.03 to 0.4 weight % of a mixture of suspending agents containing(a) a partly acetylated polyvinyl alcohol having 5 to 25 weight % acetate units(b) at least one of the following compounds: methyl-cellulose; methyl-hydroxyethyl-cellulose; methyl-hydroxy-propyl-cellulose; hydroxyethyl-cellulose; hydroxypropyl-cellulose and(c) a partly acetylated polyvinyl alcohol having 31 to 35 weight % of acetate units.Type: GrantFiled: February 16, 1978Date of Patent: March 6, 1979Assignee: Hoechst AktiengesellschaftInventors: Heinz Klippert, Ingolf Mielke, Otto Plewan